'Tis the brook's motion,
Clear without strife,
Fleeing to ocean
After its life.

Deeper devotion
Nowhere hath knelt;
Fuller emotion
Heart never felt.

'Tis loving and serving
The Highest and Best!
'Tis onwards! unswerving,
And that is true rest."

As an intimate friend of George Ripley, Dwight had discussed with him the project of a community at Brook Farm; and it was natural that he should find his place there in November, 1841. Many years later Dwight said of the purposes of Ripley, in this effort to improve upon the usual forms of social life: "His aspiration was to bring about a truer state of society, one in which human beings should stand in frank relations of true equality and fraternity, mutually helpful, respecting each other's occupation, and making one the helper of the other. The prime idea was an organization of industry in such a way that the most refined and educated should show themselves practically on a level with those whose whole education had been hard labor. Therefore, the scholars and the cultivated would take their part also in the manual labor, working on the farm or cultivating nurseries of young trees, or they would even engage in the housework."

In the Brook Farm community, Dwight was one of the leaders, his place being next after Ripley and Dana. In the school he was the instructor in Latin and music. His love for music began to make itself strongly manifest at this time; he brought out all the musical talent which could be developed among the members of the community. Of this phase he said: "The social education was extremely pleasant. For instance, in the matter of music we had extremely limited means or talent, and very little could be done except in a very rudimentary, tentative, and experimental way. We had a singing-class, and we had some who could sing a song gracefully and accompany themselves at the piano. We had some piano music; and, so far as it was possible, care was taken that it should be good—sonatas of Beethoven and Mozart, and music of that order. We sang masses of Haydn and others, and no doubt music of a better quality than prevailed in most society at that date, but that would be counted nothing now. Occasionally we had artists come to visit us. We had delightful readings; and, once in a while, when William Henry Channing was in the neighborhood, he would preach us a sermon."

At this time a musical awakening was taking place in Boston, a genuine taste for and appreciation of Beethoven, Mozart, and Haydn was being developed. Dwight was instrumental in promoting a love for these masters, and out of his classes for their study grew what were called "Mass Clubs." He and his pupils often went into Boston to hear the best music, walking both ways. In The Dial, and especially in the Harbinger, Dwight wrote with enthusiasm and poetic charm of the merits of classical music. He wrote afterwards that the treatment of music in these periodicals told the time of day far ahead; and "such discussion did at least contribute much to make music more respected, to lift it in the esteem of thoughtful persons to a level with the rest of the humanities of culture, and especially to turn attention to the nobler compositions, and away from that which is but idle, sensual, and vulgar."

To the Christian Examiner, Boston Miscellany, Lowell's Pioneer, and the Democratic Review, Dwight was an occasional contributor at this period. His chief literary work, however, was in the form of lectures on musical subjects, especially on the great composers already named. He gave a successful course of musical lectures in New York, and he lectured in a number of other cities.

To the Harbinger, which was the organ of Brook Farm after the Fourierite period began, as well as the best advocate of associated life ever published in the country, Dwight was one of the chief contributors. He wrote much in behalf of association, but he also discussed literary topics. His chief contributions were on the subject of music, which was then, as always, so near his heart. He conducted the department devoted to musical criticism and interpretation. During the last year of the publication of the paper at Brook Farm he was associated with Ripley in the editorial management.

In 1847 Brook Farm came to an end. The Harbinger was removed to New York, and Ripley was its editor; but it was discontinued in less than two years. Dwight was the Boston correspondent, and continued his editorial connection with the paper. He removed to Boston, continued his interest in association, was an active member of W.H. Channing's "Religious Union of Associationists," was one of the most zealous workers in the organization for promoting associated life, and began to write for the Daily Chronotype on musical subjects. In 1849 he edited a department in the Chronotype devoted to the interests of association, and he had the assistance of Channing, Brisbane, Dana, and Cranch. This arrangement was continued for only a few months, not proving a success. In 1851 he was for six months the musical editor of the Boston Commonwealth, he wrote for Sartain's Magazine and other periodicals on musical topics, and he continued to lecture. Ripley and Dana made an earnest effort to secure him a place on one of the daily journals in New York. In February, 1851, Dwight and Mary Bullard, who had been a frequent visitor at Brook Farm, and a member of the choir at Channing's church in Boston, of which Dwight was the musical leader, were married. She was a beautiful and attractive woman, of some musical talent, and of a most unselfish and winning character. They went to live in Charles Street, and there had Dr. O.W. Holmes and his wife for near neighbors.

In April, 1852, Dwight issued the first number of Dwight's Journal of Music. He was able to do this with the aid of several of his associationist and musical friends, who generously contributed to a guarantee fund for the purpose. The Harvard Musical Association lent its aid to the project, and made it financially possible. In the first number Dwight said of his purposes and plans: